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IEC 60309 industrial standard 63A and 125A - 6h plugs |
 60309 info |
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 16A 32A plugs |
| Given their size, 63A and 125A IEC 60309
plugs look better on a separate page. The museum is grateful to the Austrian company PC Electric GmbH - specialists in production of CEE-industrial plugs and sockets - for donating the 63A and 125A-6h plugs. |
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| 1 | 63A-6h
3P+N+earth 400V plug and 125A-6h 3P+N+earth 400V plug.
Manufacturer: PC Electric GmbH. Both plugs have an IP67 degree of protection. A swivel at cable entry provides adjustable cable grip. Swivel can be locked with a screw. For size comparison a five pin 32A plug has been added left. |
| 2 | Comparison of wire
contacts. Left: 16A CEE 7/4 (Schuko' with three contacts for 2,5 mm2
wires. Right: 125A plug with five, double secured contacts for wires up
to 11 mm2. Cable entry of most Schuko plugs allow
8 -10 mm2 cables, whereas 125A plugs can handle up to 50
mm2 (36 mm2 for 63A). |
| 3 | IEC 60309 plugs may have an additional pin. This
pilot pin fits in the pilot sleeve of a matching socket. Both the
63A and 125A shown in image no. 1 have a pilot pin. Pilot pins have a smaller diameter and are shorter than L, N and earth pins. Plug pilot pin is the last pin making contact with socket sleeve, after which power is turned on. |
When retracting a plug, contact of pilot pin and socket sleeve is broken first; power is turned off simultaneously. This sequence prevents making or breaking the circuit under load. Breaking a connection (appliance with power source) under load will cause arcing which may damage plug and socket, and is potentially unsafe for the user. |
